390798 has 16 divisors (see below), whose sum is σ = 868560. Its totient is φ = 130248.

The previous prime is 390791. The next prime is 390809. The reversal of 390798 is 897093.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390791) by changing a digit.

390798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3565 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (54285).

2³⁹⁰⁷⁹⁸ is an apocalyptic number.

390798 is an abundant number, since it is smaller than the sum of its proper divisors (477762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390798 is a wasteful number, since it uses less digits than its factorization.

390798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7248 (or 7242 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 390798 is about 625.1383846797. The cubic root of 390798 is about 73.1112334374. Note that the first 3 decimals are identical.

It can be divided in two parts, 3907 and 98, that added together give a triangular number (4005 = T₈₉).

The spelling of 390798 in words is "three hundred ninety thousand, seven hundred ninety-eight".